Safety mechanism for elevator-shaft doors



Dec. 25, 1928. 1,696,328

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAF'I' DOORS Filed June 17, 1926 5 Sheets-Sheeo 2 mmnmu Dec. 25, 1928. 1,696,328

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAF'T DOORS Filed June 17, 1926 5 Sheets-Sheet 5 m N ENVENTOR Q W ATTORNEY Dec. 25, 1928.

ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS iummnun Filed June 17; 1926 5 Sheets-Sheet 4 Dec. 25, 1928. 1,696,328

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed June 17, 1926 5 Sheets-Sheet 5 ATTORNEY Patented Dgc. 25, 1928.

UNITED STATES 1,696,328 PATENT OFFICE.

ALBERT J. BOSENTBETEB, O1 BOONTON, NEW JERSEY, ASSIGNR '1'0 EDGAR ZA.'BBI- SKIE, O1 IAIPLEWOOD, NEW JERSEY, AN'D FRANK E. HU'IGHINS, O1 NEW YORK,

SAI'IETY 1mcm1msm FOB ELEVATOIB'-SHAFT noons.

Applicatioiz filed Inne 17,

An objeci; of this invention is to provide ower mechanism for concurrently opening o1 c1osing the cm ga1;e and the shaft door opposite to which thQ car niay be stopped,

by coupling means carried by the car and deviee for opening and clo sing the car gate and shaft (1001, sind has means im relieving 1e friction when there is any undue strain oxerted to move the gute and (1001.

A further object is to provide means, the operat ion of hich, after it has been initi- :1%ed, wilYcontinue automatically until the gute und (1001 are fully opened o1 closed.

A further object is to provide a s'e arate means f01 stopping the opening o1 c osing of the gate und (1001 at any point of the travel.

In the accompanying drawings which form a part of this description,

Fig. 1 is an, elevation of an elevator car, iogther with the automatic ca1 gate and shaft door opening :md closing mechanism which cmbodies the invehtion;

Fig. 2 is a ve-rtical section on the line 2-2 bf Fig. 1, through the car ggate, am] showfing a portion of the car and adjacent shaftway and shaft dem;

Fig. 3 is an elevation of the shaft door in close'd osition, together with the toggle members am] the sliding member through which it is opened and closed, viewed f101n the shaftway side;

Fig. 4 is a sirnilar fiew showingthe shaft door released fo1 opening und slightly opened;

Fig. 5 is a similar view showing the shaft door fully opened;

-Fig. 6 is a horizontal section through the shaftway at a shaft door, on the line 6-6 0f Fig. 3, together with a section through tho elcvator nur, bmken away und drawn t0 :1 largcr scule;

Fig. 7 is a horizontal s ection of a portion of the abovc drawn to a still lzuger scale;

Fig. 8 is a vertical section on H10. line 88 of Fig. 7 showing the connection f1om tho 1926. Serial N0. 116,588.

blade of the traversing member 110 the car gate and shaftdoor;

F1g. 9 is a lan 0f the top of the car, including the motor, traversing member und connecting mechanism;

Fig. 10 is an elevatioh of the same, show- 111g the parts in dotted lines in the osition they assume when the gate and (1001 are opened;

- Fig. 11 is an enlar ed view of a portion of the preceding, ont e line 11--11 of Fig. 9, showing the friction connection through which driving is eifected;

Fig. 12 is a vertical secti on on the line 12-12 o:f Fig. 9, showing the traversing member and tho manner of its engagement with the cam bar;

Fig. 13 is a similar section shwing the traversing member displaced and rocked to band the blade into engaging osition with a flange carried by a shafi; door;

Fig. 14 is an elevation of a, ortion of the camming bar for rocking the traversing member;

-Fig. 15 is a diagram of the circuits.

An elevator car traveling in a shaftway 21 has a collapsible slidin ga.te 22, and the shaftway has at euch land1ng a. sliding doo1 23. The opearting mechanism comprlses an electric motor 24 preferably mounted on the top of the c2ir. The motor is suitably geared down so as t0 slowly turn afriction drum' 25 which is gripped by shoes 26, 26 which carry a toggle link in two parfs 27, 28 hingedtogether at 29, but normally kegt in line und swung by the drum about its ax1swhen the drum is turned, us shown in dotted lines in Fig, 10. Should there be an excessive strain beeause the toggle link is restrained from swinging, there will be a slight movement on the hinge connection, and a flattened wrist pin 30, carried ut the end of the link art 28, is turned between the two shoes so as to spread th6m und. thereby relieve the friction.

Through a pivot 31 the toggle link above mentioned is connected through a second toggle link 32 t0 a, tmversing member 33, which has a depending blade 34 connecting to the car gate at its lower end where it has a verticall'y sliding connection 35 guided in ways 35. Between the ends of blade 34 is il hinge 36 which, permits of its being out- Wardly bent or dis[laced at this p0int.- The tmversing member is guided preferably hy a round horizontal rail 01 bar 37 a nd has a, fork 33 emb1acing a camming bar 38. The rai1 01' bar 37 pe1mits tl1e traversing member 33 to l1ave a transverse 1ange of movemen on the car corresponding with t.l1e full open Position of euch doo1 23. Botl1 b:11"s are supported at tl1eir ends f1'0111 the top of tl1e ca1. The camming bar 38 is rocknble and is so shaped along its guide su1faces (see Fig. 12) that immediately upon starting to open the c2117 gute the portion of the tmversing me1nbe1 which engages the camming bar is depressed thereby, the traversing me1nber is rocked, and tl1e depending blacle is outwardl it is hinge as shown in Figs. 8 and'l3. This condition continues throughout the rast of the movement. The bifurcation of the fork under the camming bar is yieldingly hold by a spring 39 so that tl1e 'blade will not be rigidly hold in its displaced position und can yield if the car should be run while it is displaced and any projection in the shaftway is encountered.

At each floor landing of tl1e shaftway the sl1aft-d0or is providecl with an opemting toggle mechanism consisting of folding lever members 40 111d 41 pivoted to each other, whicl1 are preferably operated and the door thereby automatically closed und l1eld closed as sei; forth in my United States Patent N0. 1,203413, dated October 31, 1916. The first lever member 40 is pivoted to the door and.

has an oblique arm 42 with rollers 42. The othen lever member :is pivoted t0 a fixed bracket 43. The seid toggle mechanism for locking and closing the door is independent of tl1e motor.

A sliding member 44 carried by the door has a fiange 44 engaged by tl1e depending blade 34 of the travei'sing member and another flange 44, contacting first with the oblique arm 42, releases the'door from the locking action of the toggle mechanismand 011 further movement opens tl1e d001. (See Figs. 3, 4 und. 5). O11 a reverse movement, the 1:0ggle lovers 40 und 41 are caused to act 011 the flange 44 so es to close tl1e shaft (1001. The said flanges constitute abutments. When the door is cl0sing, the toggle mechanisrn, the abutment flange 44 and sliding member 44 will cause the abutment flange 44 to follow upthe displaceable travorsing member 33 as the 1atter returns to the closecl osition of the door.

Referring briefly to the diagrmn, Fig. 15, the motor is controlled by a pai1 of relays 50, 51, one of which is closed by a magnot coil 52- on circuit closu1e at a normally opon switch 53 011 the car when tl1e cm gute und shaft (1001 are to be opened: The relay also closes its own magnet circuit at 21 contuct 54 und the circuit therefore remains closo l. even if the car switch 53 is openocl, until the car gute and shaft (1001 have fully displaced at the point where opened, when tl1e magnet circuit is opened by a limit switch 55, which is also sl1own in F ig. 9. The otl1er relay 1nakes a reversed circuit through the annuturo o1 tl1e 1110t01 and is closed by a magnet coil 56 011 circuit closure at 21 normally open switch 57 on tl1o ca1 when the car gute (111d sln1ft (1001 am to be closed. The rclny also (loses its own magnct circuit ab u, contnct 58 and tho circuit therefore remains closed, even if tl1o 0:11 switch 57 is opened, until the cm gute und shaft doo1 l1ave fully closed, by a li1nit switch 59, wl1ich is likew-ise shown in Fig. 9. The two relays a1e interlocked so tlmt both cannot be closed at the Same time. A thi1d normally olosed car switch 60, uncle1 the control of the car ope1ator, is in the circuit of both relay magnets und enz1bles the operator to arrest the automatic closing 01' openin of the d001s at any point, afto1' wl1ich 710 can operate either the openin 01 the closing switches to cornplete the (001 movements either way.

Referring mo1e speoifically to Fig. 15 there is shown a complete cont1ol cquipment in which positive wire 61 111d negative wire 62 are tl1e service supply leads. \Virc 61 is connected to terminals 63 and 64 of the comtactors 50, 51. Wire 62 is connectcd (0 wire 72 feeding series fields 74 und 75 an(l thence by wir'e 76 to contactor terminals 65 an l 67.

011 the contactor 51 switch contact 79 is counected by wire 69 to switch contoct 103 011 contacto1 50 and thence by wire 100, tl11ough coil 99 to armature brush 70. Switch coutact on contactor 51 is connected by wiro 68 to switch 'contact 104 on contactor 50 und thence by wire 101 to armature brush 71. Negi1tive wire 62 is also connected througl1 wire 72 to shunt field windings und 94 and thence by wipe 93 t0 positive wire 61.

When contactor 51 is closed armaturz: brush 70 is connected to positive linc :uul armature b1ush 71 is connected through thP series field to negative line 62.

This would cause tl1e motor 24 to run in one direction while if contactor 50 is closed positive line 61 will bo connected to annuture brush 71 und negative line 62 will b0 connectedthrough the serics fiel(ls to annuture brush 70. As the shunt fields am (011- stantly across tho line in one direction the motor will then run in the opposito diroction.

Switcl1os 57 and 60 and 53 locatod in tl1o car a1e used to cont1ol tl1e operation of coutactors 51 und 50 as follows: Negative line 62 is'connected through wi1e 92 to switvl: 60 at terminal 89 und wl1en switch 60 is closed' as shown, curren't is tl1cn lod from torminal 102 through wire 96 to tho two limit switcl1es 59 und 55 0110 of wl1ich repros.ents the limit of tmvel of tl1e (1001 in um: ditection und tl1e otho'r fl1e limit of travvl of the (l001 in tho. other direclion.

Assuming that switch 53 is to open thv d bor and switch57 is to close the dem, the11 hmit switch 59 will be in series with the magnet56 of eontactor 51 and this switch y Will be closed when the doors a1e closed.

on contacts 58 from positive switch contact 79 through wire 82 to wire 83, thence t0 coil 56.

Whenthe motor has opened th'e doorthe amount required, switch 59 opens, breaking the magnet circuit 56 and allowing the contactor 51 toopen the supply circuits from both negative and positive wires t0 the armature f the motor. At the time the contactor 51 closes, current i's supplied from negative line 62 t0 wire 72,.series fields 74, 75, wire 76, termi'nals 65, 80, wires 68, 101, brushes 71,70, wire 110, coil 99, wire 100,

wire 69, terminals 79, 63,wire 105 tp positivie line 61. This cau ses the magnet 99 to open the brake shoes 111 and 112 so that they will no longer be pressed agaiinst the brake pulley 113 by spring 114. when the comtactor 51 opens, the circuit feeding the brake is broken-between contacts 79 und 63, thus de-energizi-rig the h1agnet 99 and allowing the spring 114 t0 pifll the brake shoes tightly against a pulley 113 mounted 0n the motor shaft.

T0 close the door the operator closes switch 57, feeding positive current 'from line 61 through wire105, wire 91, switch terminal 106, syvitch 57, switch terminal 87, wire 108, wire 86, coil 52, wire 90, wire 97, to limit switch 55, thence through wire 96, switch terminal 102, switch 60, switch terminal 89, wire 92 to negative line 62. .This causes the magnet 52 to close the contactor 50, thus causing the armature of the motor 24 t0 receive cmrent from li'ne 61 to armature brus:h 71 und negative current from line 62 throu'gh se1ies fields and armature brush 70. At the same. time the magnet 99 015 brake is energized inthe same mariner as before.

The circuit, when the contactor 50 is closed, is through wire 61, Wi1e 105 t0 terminals 64, 104, wire 68, wire 101 t0 blushos 71, 70, wire 110, coil 99, wire 100 to terminals 103, 67, wire 76, series fields 75, 74:, wire 72 and wire 62.

What I claim as new is:

1. In combination With an elevntor ca1 having a -gate und a shaftway with automatically closable sliding doors at the floor landings, an operating mechanism for the shaft doors which comprises a motor -carried by the car, abutment members carried by the doors, by 'which they are released 2ind opened, a traversing member carried by the car'and connected with the ca1 gate for engageme'nt with the abutinents, means' for guiding the traversing member transversely of the car, ind ependently of the c ar gzite, and for a distance correSponding with the full op'ening' rnovement of the 'shaft door, and means for outwerdly displacing the traversing membe1 into engagement withan abutment member.

2. In eombination witli an elevator car having a gute am]. a shaftway with automatically closable sliding doors at the fl001' landings, an operating mechanisxn for the shaft doors whi ch comprises a motor earried by the cat, abutment members carried by the doois, by which they are released and opened, a traversing .member earried by the car and connected with t-he cm gate am]. having an outwardly displaceable blade for engagement with the abutments, means for guiding the traversing member transversely .of the car, independently of the car gate, and for av distance corresponding with the full opening movement of the shaft door, and a camming bar for rocking the traversing member f0r efi'eeting engagement of the .blade with an abutment member, and means operated by the motor for operat-ing the traversing member transversely foi effecting the opening of a door when the car is et a, floor landing.

3. In combination with an elevator cz'1r with a sliding car gate and a shaftway with sliding doors at the floor landings, abut- 1nent members czirried by the shaft doors by whieh they are released and opened, a

traversing member with an outwardly displaceable blade depending from the top of the car and connected witli the gate for engagement when flexed with an abutment member, means for displacing the binde und means for operating the traversing member for efl'ecting the simultaneous opening of the gate and a (1001 when the car is at a fi001' 1anding.

4. In combination with an elevator car with a;siiding car gateand a shaftway with sliding shaft doors at the floor landings,

'abutments carried by the shaft doors by which they are released and opened, a traversing membei at the top of the car with a depending outwardly displaceable blade connected to it at its upper end und to the gate at the othet end and havin! an intermediate hinge for engagement when baut at the hinge with a doo r abutment, 1neans f01' displacing the binde and means .for

operating the traversing me mber for eifecting the. simultaneo'us opemng of die gute and a door when the cm is at a floor land- 5. In cmbination with an elevator car with a sliding ca1 gate and a shaftway with sliding doors, abutments carried by the 'shaft doors by which th0y are released and open0d, an operat-ing 1nechanism f01 the car gute and s11aft doors' which con1prises a 1110t0r carricd by th0 (.11, a. pravcrsing membe1 ca1ried by the top of the car with a depending outwardly displaceabla blade connected with the gate, means f01 flexing 1110 blade and 1110ans for operating th0 traversing men1ber f01 eifecting the simultancous opening of the gate and a dem When the ca1 is at a floor landing.

6. An operating mechanism for a slidin gat0 which connects 12110 gate to a source 0T p0w0r th10ugh a friction connection, such mechanism con1prising linkage, and means in th0 linkage, comprising a yielding joint f01 relieving the friction connection when t11010 is an excess strain.

7. An operating lnechanism f01 a sliding gate c0nsisting 0f toggle links pivoted t0 011011 0ther, 0110 of whichis connected to the gute and the other 0f which is connect0d t0 11 s0111c0 0f p0wer throngh a friction connection and means :E01 relieving the friction connection when there is an excess strain.

8. An operating mechanism f01 a s1iding gate consisting of toggle links pivoted t0 021011 other, one of which is c onnectegljag 1110 gute and tl1e oth0r 0f which is connected a s0111c0 of Power tl1rough shoes bearing on a friction drum, and means for re- 1i0ving th0 pressure of the shoes on the (1111111 wl1en there is an excess st1ain.

9. In combination with an elevator 0:11 and shaftway with doors at 13110 floor landings, an operating mechanism for a shaft (1001 which comprises an elechi0 11101301, a conn0ction between the moto1 and the (1001, a band switch f01 cl0sing a circuit which initiates t110 Operation 0f the motor, ;an automatically operated switch which holds tl1e circuit closed after it has been closed by 1110 band switch, and a limit switch which is automatically opened when ehe (1001 has been fully opened.

10. In combination with an elevator ca1 and shaftway with doors ab (h0 floor landings, an ope1ating mechanis1n f01 a shaft (1001 wl1ich comprises an 0l0ctric n10t01, a c0nn0cti0n bctw0en 1110 1notor and the (1001, a band swifch f01 closing a circuit which initiates th0 opcration 0f 1110 1n0t01, an automatically operatcd switch Whi(h holds th0 ci1cllit clos0d after it has b0en closed by t110 11an11 switch, a lim it switc h which is auton1atically op0ned w110n the (1001 has been fully opened, and a separate hand switch f01 0p0ning th0 circuit and arresting the operation 0f t-110 (1001 w1icn at an intermediat0 point of its movement.

11. In cornbination with an e1evator (111 and a shaftway with a movabl0 d001 at a floor landing, an operating mechanisn1 f01 the shaft (1001 comprising a 1110101 carried by th0 0a1, rneans f01 locking and closing the dem, andwhich means 1110 independent of the motor, an abut1nent n1e111b01 carri0d by th0 (1001, by Which 1110 locking 1neans 1110 released and the (1001 open0d, a traversing member carried by the car f01 0ngage1ncnt with the abutment n10n1b01, rn0ans for displacing the trav0rsing member 11110 0ngage- 1n0nt with th0 abnt1nent member, means operated by tl1e motor f01 operating th0 t1aversing member for efi0cting th0 op0ning of the (1001 wh0n th0 ca1 is at tl1c floor land ing, and xneans actuated by the (1001 cl0sing means f01 causing the abutment member t0 follow up the displaceable traversing 1110mbe1 when it retums to cl0s0d position of the (1001.

12. In combination with an 010111101 0111 and a shaftway with a movable (1001 at a floor landing, an ope1ating mechanism f01 the shaft d001 con1prising a 1n0t0r carri0d by the car, means f01 locking and closing th0 (1001, and which 1neans a10 independent of the motor, an abutment 1ne1nb01 n1ountud f01 mov0n10nt on the d001, and by w11i011 th0 locking means a1e 10l0as0c1 and th0 (1001 opened, a. traversing member carried by 1110 0:11 f01 engage1nent with 1110 abutment 1110mber, n1eans f01 displacing the t1aversing n1ember into engagement with tl1e abutment m0mber, means operated by t110 1110101 f01 operating the traversing 11101111101 f01 0fl'ecting the opening 0f the (1001 w11en t110 ('111 is ab the floor landing, and a second ahnt- 1110nt membe1 actuat0d by th0 d001 closing m0ans for causing t-h0 first abut1n0nt 1110111- ber to follow up thedisplaccable trav0rsing 1nember when 1t 10t11111s t0 cluscd pnsiti0n 0f the door.

13. In combination with an 0101M01 (111 and a shaftway with a movable (1001 at 11 floor landing, an operating n1echanism f01 th0 shaft d001 co1nprising a 1110101 ca11'iod by the car, automatic 1n0ans f01 l0cking and closing th0 (1001, an abutment n10111b01 (111'- ried by th0 (1001, by which tl1e locking means a1e released and th0 (1001 opened, a traversing membe1 carried by t110 (a1 f01 engag0- m0nt with the abutment m0111b01 and having a transvers0 rang0 0f movement on tl10 0111 corresponding with th0 full open p0sit'1on of the door, n10ans f01 displacing tl10 traversing memb0r int0 engagemont with 1110 abutment m0mber, and n10ans 0p0111f011 bv the motor f01 causing t110 trav0l 0f t110 traversing member al0ng its said 111n; 0 0f motion f01 eflecting the 010ning 01' 1110 (1001 when the ca1 is at th0 001 landin;z-

14. In combination with an 0lovat0r 0:11 and a shaftway with a 1110vz11110 (1001 111 11 floor landingz, an operatingr n1ochanism f01 th0shaft d001 comprising a 1110101 0:111i0(1 by the car, an abutment 11101111101 ca1rio11 by the door, by whih the door is opened, a traversing member carried by the car and depending in a substantially upright position from the top thereof, for engagement with the abutment member, und having a transverse range of movement corresponding with the fu1l 0 en osition of the dem, means f01 outwar ly isplacing the braversing member into engagement with. the abutment member, and meanS operated by the motor for causing the travel of the traversing 1nernber along its said range 0f motion for efl'ecting the 0 ening of the door when the car is at the 001 landing.

15. In combination with an elevator car and a shaftway with a movable door at a floor landing, an operating mechanism for theshaft door comprising a m0tor canied by the car, an abutment member carried by the door, by which thedoor is opened, a tra.versing member depending from the top of the car for engagement with th abutment member means for outwardly swinging the traversing member from the top of the car into engagement with the abutment member, and n1eans operated by .the motor for operating the traversing member for eflecting the opening of the door when the car is at the floor landing.

ALBERT J. ROSENTRETER. 

